Kill some newly added whitespace

Signed-off-by: Jens Axboe <axboe@kernel.dk>
diff --git a/HOWTO b/HOWTO
index 2f70b94..ec7005f 100644
--- a/HOWTO
+++ b/HOWTO
@@ -605,13 +605,13 @@
 			falloc   IO engine that does regular fallocate to
 				 simulate data transfer as fio ioengine.
 				 DDIR_READ  does fallocate(,mode = keep_size,)
-				 DDIR_WRITE does fallocate(,mode = 0)  
+				 DDIR_WRITE does fallocate(,mode = 0)
 				 DDIR_TRIM  does fallocate(,mode = punch_hole)
 
 			e4defrag IO engine that does regular EXT4_IOC_MOVE_EXT
 				 ioctls to simulate defragment activity in
 				 request to DDIR_WRITE event
-	      
+
 			external Prefix to specify loading an external
 				IO engine object file. Append the engine
 				filename, eg ioengine=external:/tmp/foo.o